Loom fringe motion

ABSTRACT

A fringe motion for looms of the shuttleless type adapted to selectively control the omission of a number of picks during loom operation to produce, in continuance of normal weaving, nonwoven bands of warp yarns of a predetermined width.

United States Patent [72] Inventor Stanley C. Tiernan 56] References Citd Bellmgha'", Mass- UNITED STATES PATENTS [21] Appl. No. 792,594

3,276,482 10/1966 Liebchen 139/122 [22] Filed Jan.2l,1969

3,396,755 8/1968 NlChOlS et a1. 139/116 [45] Patented Feb.9, 1971 3457966 7 1969 C 139122 [73] Assignee North American Rockwell CorporationU131 Pittsburgh, Pa. Primary Examiner-Henry S. J audon a corporation ofDelaware Attorney-John R. Bronaugh [54] DOOM FRINGE MOTION 6 Claims 2Drawing Figs ABSTRACT: A fringe motion for looms of the shuttleless type[52] [1.8. l 139/116 adapted to selectively control the omission of anumber of [51 1 Int. Cl D03d 47/34 picks during loom operation toproduce, in continuance of [50] Field of Search 139/25, 26, normalweaving, nonwoven bands of warp yarns of a predetermined width.

PATENTED FEB 9|97| CONTROLLER M m P W C V Y NE L m T 3 ma 0W ATTORNEY 1LOOM FRINGE MOTION BACKGROUND OF THE INVENTION The invention pertains toa fringe motion for looms and,

I more particularly, to such a motion for looms of the shuttleless whichupon finishing the fabric will form so-called fringes at the endsthereof. The mechanism according to the instant invention relatesprimarily to a means for permitting the loom to operate withoutinserting picks 'of filling yarn at predetermined points in the fabricas it is being formed.

SUMMARY OF THE INVENTION The fringe motion of the present invention iseffective in preventing actuation of certain mechanicalfunctions duringactual operation of the loom and according to a preferred form of theinvention these functions are governed by the dictates of a controllerunit such as shown and described in US.

Pat.No.3,29l,l58.

The invention includes a slidable guided rod having one endinterconnected by means of a linkage member to the controller unit andthe opposite end includes a pair of depending tine members disposed inspaced and aligned relation. This slidable guided rod is held in arearwardly or withdrawn position by means of the linkage member and itsconnection to the controller unit. The rod is biased by spring meanstoward the front of the loom and upon an indication from the controllerunit it is released and permits the biasing force to move it to anactive or forwardly position. During this movement the depending tinemembers fixed on the forward end of the rod contact and move the fillingyarn to a position out of reach of the filling depressor which isnormally effective in presenting said filling to a carrier member forinsertion into a warp shed.

The carrier members are permitted to continue operating without fillingyarn and to prevent the loom from knocking off for lack of filling thecontroller unit is timed to deactivate the loom stop motion by amechanism such as that shown and described in US. Pat. No. 3,396,755.

It is a general object of the invention to provide a method and means offorming fringe automatically at predetennined points on fabric as it isformed on looms of the shuttleless type.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a perspective view of aportion of a shuttleless loom showing the filling depressor and meansaccording to the invention for displacing the filling.

FIG. 2 is a perspective view of part of the mechanism of FIG. 1 showingthe member for displacing the filling being held in a withdrawn orinactive position.

DESCRIPTION OF THE PREFERRED EMBODIMENT As the general construction andoperation of this type of loom is well known and familiar to thoseskilled in the art, and as the invention is entirely concerned with ameans for selectively preventing the insertion of filling, it is onlyconsidered necessary here to illustrate and describe those parts of aloom directly concerned with a preferred form of the present invenguide12 is fixedly attached to the loomside and serves to guide the fillinginserting carrier I3 as the latter is inserted into sheds of warpthreads 14 and then withdrawn therefrom.

The filling yarn is identified in FIGS. l and 2 by numeral 15 and isdrawn from a stationary source of supply (not shown) disposed at theside of the loom.

The usual type friction device is utilized and includes a mountingbracket 16 (FIG. I) the forward end of which is fixedly attached to theside of the conventional filling control housing (not shown) that issituated on the right hand upper front portion of a shuttleless loom.Extending rearwardly, the opposite end of the mounting bracket I16supports a friction plate bracket 17 on which a pair of verticallydisposed spring biased friction plates 18 and 19 is assembled and whichserves to keep the filling yarn 15 under tension as it is caused to passtherebetween. After passing between the friction plates 18 and 19, thefilling extends across the upper surface of a horizontally disposedguide bar 20 and thence through an eyelet 21 provided in and adjacentthe free end of a filling positioner arm 22. By means of a screw 23, thefilling positioner arm 22 is attached to a double anned lever 24 that iscaused to oscillate in a well-known manner to swing said positioner armto and fro for placing the filling yarn 15 in the proper position forpickup by a filling depressor member 25.

During loom operation the filling depressor member 25 is continuallymoving in a vertical plane and forms somewhat of an elliptical path allof which is well known to those familiar with the art. As the depressormember moves downwardly from its uppermost position it is adapted toengage the filling yarn 15 and move it to a lower position where it isreceived by the filling inserting carrier 13 which then inserts it intothe warp shed.

The filling extends from the eyelet 21 in the positioner arm 22 towardthe cutter and binder device not shown, but which is carried by acontrolled unit comprising a horizontally disposed spring biased rod 26that .is caused to reciprocate by cam means carried in theaforementioned filling control housing (not shown). This unit alsosupports the so-called second pick positioner a portion of which isshown and identified in FIG. 1 by numeral 27.

Filling yarn is inserted into sheds in the form of interconnected pairsof picks or so-called hairpins with each length of pick being in aseparate shed. On the first half of a pair of interconnected picks theend of the filling yarn is being held by the aforementioned cutter andbinder device and the positioner arm 22 is in its rearmost position orin the position opposite that shown in FIGS. 1 and 2. When the secondhalf of the hairpin is to be inserted, the positioner arm 22 is in itsforward most position as shown in FIGS. l and 2 and the filling yarnextends through the second pick positioner to the edge of the fabric allof which is known to 'those familiar with shuttleless weaving.

The positioner arm 22 is caused to swing to and fro for positioning thefilling for the first and second half of each hairpin and the point ofintersection during this swinging movement of the filling which extendsinwardly from said positioner arm is disposed so as to be within thepathway of the filling depressor arm 25. As the depressor arm movesdownwardly, it catches thefilling and pulls it to a lower position forpick up by the in serting carrier.

The method and means according to the invention for forming unwovenbands of warp threads at predetermined locations in fabric as it isbeing formed, comprises a controlled device for moving the filling yarnout 'of the pathway of the depressor arm 25 while permitting the loom tocontinue operating without inserting picks of filling.

The controlled device is identified generally in FIGS. 1 and 2 bynumeral 28 and includes a horizontally disposed slidable rod 29. Rod 29is supported for sliding movement in a guide block 30 which is attachedto a mounting bracket 31 the latter of which is suitably fixed to theupper end loom frame member partially shown and depicted in FIG. 2 bynumeral 32.

The slidable rod 29 extends outwardly from each end of the guide block30 and is provided on its forward end with a slot 33 which is adapted tosupport a pair of depending tine members 34 and 35 disposed in spacedand aligned relation.

A screw 36 assembles in and adjacent the forward end of rod 29 and is sodisposed as to pass through the slot 33 drawing the sides thereof intoclamping engagement with and to fixedly position the tine members 34 and35. A collar 37 assembles on rod 29 by means of a setscrew 38immediately adjacent to slot 33 and that portion of said rod extendingbetween said collar and the guide block 30 supports a coil spring 39.

Rod 29 is restricted to longitudinal movement in the guide block 30 androtation thereof is prevented by means of a key 40 which extends forsubstantially the full length thereof. A grease fitting 41 (FIG. 2) inthe guide block 30 provides adequate lubrication to assure unrestrictedsliding movement of the rod 29. Coil spring 39 is assembled on rod 29under tension and is adapted to continually urge said rod toward itsforward most position.

As shown in FIG. 2, a collar 42 is fixed by means of a setscrew 43, torod 29 adjacent its rearward end and provides a means for limiting theforward longitudinal movement of said rod.

Control linkage 44, which may be in the form of a Bowden wire, issuitably attached to the rearward end of rod 29 as at 45 with theopposite end thereof being attached to and controlled by the dictates ofa controller unit 46 such as shown and described in U. S. Pat. No.3,291,158 heretofore referred In operation filling yarn is inserted intowarp sheds in a manner well known to those conversant in the art ofshuttleless weaving. The filling depressor arm moves continuously in anelliptical path and is timed to draw the filling yarn downwardly to aposition for pickup by the inserting carrier which carries it into thewarp shed.

On indication from the controller unit, the loom stop motion isdeactivated as shown and described in the aforementioned US. Pat. No.3,396,755. At this time the controller unit also gives an indication forrelease of the rod 29 that is being.

held in an inactive position by the control linkage 44. Release of rod29 permits coil spring 39 to expand and in an attempt to seek'its freelength it moves said rod in the direction of the indicating arrow 47shown'in FIG. 1. This movement carries the depending tine members 34 and35 forwardly which are adapted to contact the filling yarn l5 and pushit out of the pathway of the filling depressor arm 25. The fillingdepressor arm continues to follow its normal path of travel but fails tomake contact with the filling and a band of unwoven warp threads areformed as the loom continues to operate.

When the width of this unwoven band reaches a predetermined size, normalweaving is resumed through indications from the controller unit. Thefirst indication is effective in withdrawing rod 29 to an inactiveposition which compresses spring 39 in readiness for again moving saidrod forwardly. A further indication activates the loom stop motion andnormal weaving is resumed.

lclaim:

1. In a shuttleless loom of the type having a stationary external sourceof filling, reciprocable carrier means for inserting pairs ofinterconnected picks of filling from said source into separate sheds ofwarp yarns, and afilling presenting member adapted for movement in apath to contact and present said filling to said carrier means,mechanism for controlling the insertiori and omission of picks offilling in the sheds of warp threads during loom operationwhichincludes:

a. means for guiding the filling in a predetermined path from saidsource of supply to a first position within the pathway of said fillingpresenting member for inserting the first half of a pair ofinterconnected picks;

b. guide means for moving the filling in afirst direction out of saidpredetermined path to a second position within the pathway of saidfilling presenting member for insertmg the second half of a pair ofinterconne cted picks; and c. a displacing means for moving the fillingin a second direction away from said first and second positions and outof the pathway of said filling presenting member to prevent theinsertion of picks into said sheds.

2. The mechanism as defined in claim 1 wherein said displacing meansincludes:

a. a patterned controller unit;

b. a filling displacing member for moving the filling to an inactiveposition out of the path of said presenting member; and

0. control linkage interconnecting said controller unit with saiddisplacing member for selectively releasing the latter to engage andmove said filling and for withdrawing and holding said member inposition clear of said filling.

3. The mechanism as defined in claim 1 wherein said slidable fillingdisplacing member includes a horizontally supported slidable rod havingone end thereof interconnected with said controller unit by means ofsaid control linkage.

4. The mechanism according to claim 3 wherein the-other end of saidslidable filling displacing member includes a pair of depending tinemembers disposed in aligned and spaced relation for contact with andmovement ofsaid filling to said inactive position.

5. The mechanism according to claim 4 wherein said slidable fillingdisplacing member includes a spring member adapted to function incooperation with said horizontally supported rod for continually urgingsaid tine members in the direction of said filling.

6. A method of forming fringe on fabric in a shuttleless loom of thetype having a stationary external source offilling, carrier means forinserting pairs of interconnected picks of filling from said source intoseparate sheds of warp yarns, and a filling presenting means adapted totravel in a path to contact and present said filling to said carriermeans, said method including the steps of:

a. guiding the filling in a predetermined path from said source ofsupply to a first position within the pathway of said filling presentingmeans for inserting the first half of a pair of interconnected picks;

b. moving the filling in a first direction out of said predeterminedpath to a second position within the pathway of said filling presentingmeans for inserting the secondhalf of a pair of interconnected picks,and

c. moving the filling in a second direction away from said first andsecond positions and-out of the pathway of said filling presenting meansto prevent the insertion of picks of filling into said sheds.

mg UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,56l,498 Dated February 9 197].

Inventor(s) STANLEY C TIERNAN It is certified that error appears in theabove-identified patent: and that said Letters Patent are herebycorrected as shown below:

Column 4, lines 28 and 29, delete "slidable".

Signed and sealed this 25th day of May 1971.

(SEAL) Attest:

EDWARD M.F'LETCHER,JR. WILLIAM E. SCHUYLFR, JR. Attesting OfficerCommissioner of Patents

1. Ien a shuttleless loom of the type having a stationary externalsource of filling, reciprocable carrier means for inserting pairs ofinterconnected picks of filling from said source into separate sheds ofwarp yarns, and a filling presenting member adapted for movement in apath to contact and present said filling to said carrier means,mechanism for controlling the insertion and omission of picks of fillingin the sheds of warp threads during loom operation which includes: a.means for guiding the filling in a predetermined path from said sourceof supply to a first position within the pathway of said fillingpresenting member for inserting the first half of a pair ofinterconnected picks; b. guide means for moving the filling in a firstdirection out of said predetermined path to a second position within thepathway of said filling presenting member for inserting the second halfof a pair of interconnected picks; and c. a displacing means for movingthe filling in a second direction away from said first and secondpositions and out of the pathway of said filling presenting member toprevent the insertion of picks into said sheds.
 2. The mechanism asdefined in claim 1 wherein said displacing means includes: a. apatterned controller unit; b. a filling displacing member for moving thefilling to an inactive position out of the path of said presentingmember; and c. control linkage interconnecting said controller unit withsaid displacing member for selectively releasing the latter to engageand move said filling and for withdrawing and holding said member inposition clear of said filling.
 3. The mechanism as defined in claim 1wherein said slidable filling displacing member includes a horizontallysupported slidable rod having one end thereof interconnected with saidcontroller unit by means of said control linkage.
 4. The mechanismaccording to claim 3 wherein the other end of said slidable fillingdisplacing member includes a pair of depending tine members disposed inaligned and spaced relation for contact with and movement of saidfilling to said inactive position.
 5. The mechanism according to claim 4wherein said slidable filling displacing member includes a spring memberadapted to function in cooperation with said horizontally supported rodfor continually urging said tine members in the direction of saidfilling.
 6. A method of forming fringe on fabric in a shuttleless loomof the type having a stationary external source of filling, carriermeans for inserting pairs of interconnected picks of filling from saidsource into separate sheds of warp yarns, and a filling presenting meansadapted to travel in a path to contact and present said filling to saidcarrier means, said method including the steps of: a. guiding thefilling in a predetermined path from said source of supply to a firstposition within the pathway of said filling presenting means forinserting the first half of a pair of interconnected picks; b. movingthe filling in a first direction out of said predetermined path to asecond position within the pathway of said filling presenting means forinserting the second half of a pair of interconnected picks; and c.moving the filling in a second direction away from said first and secondpositions and out of the pathway of said filling presenting means toprevent the insertion of picks of filling into said sheds.